SCIURIDH®—SCIURUS TEPHROG ASTER. 765 
I have met with no description published earlier than 1867 that seems 
at all applicable to this species. So far as external characters are concerned, 
it might be regarded as a subspecies of S. estuans, the differences being far 
less than between either of the subspecies of S. hudsonius, and rather less, or 
certainly not greater, than obtain between S. @stuans estuans and S. estu- 
ans rufoniger. It was only the discovery of the presence of two upper pre- 
molars (the first also large for a Sciurus) that led me to recognize it as 
specifically distinct from S. estwans. Five of the eight skins of S. tephro- 
gaster contain the skulls, and in each are two upper premolars. On the other 
hand, in examining the dentition of some twenty or more specimens of S. 
@stuans, embracing about an equal number of each variety, I have met with 
none having more than a single upper premolar. 
The habitat of S. fephrogaster may be considered as embracing Southern 
Mexico and Central America, and as extending southward over the northern 
states of South America to Central New Granada, and probably to Ecuador. 
TaBLe LVI.—Measurements of seven specimens of SCIURUS TEPHROGASTER. 
H . 
1G From tip of nose to— Tail to ond Length of— 
8 2 of— & 
a | 8 ¢ 
5 a Locality. . - : 
COS o : Se ei | nese isc 
= | ‘a 5 a Sf olet Woss 
2 | = ; 2 [mses mez sat 
3 |% wig lel/el/dlelel2 1/212 
E 2] > (aI 
SWS ale |e |/o}]es |e] | & ) A) 
208 een | PV OXICO ne cnet as ocatca--teloniten canes aaccaes pot aa fo | 0.95 | 1.80 | 2.00 | 8.50 | 7.00 | 9.00 | 1.50 | 2.08 ]..2... 
BR | 4) Bede OO bearere once pane ests ononinetautee sane aca HON OG | Lerdstl ome a ale OB | eee] eee 1.35 | 2.05 |.--... 
7206 | 13 -| ot | 0.93 | 1.83 } 2.10 | 8.75 }-----.]...-.. 1.22 | 1.95 | 0.52 
TRAD 1 Q | 0.97 | 1.90 | 2.20 | 9.25 |...... ---- | 1.40 | 2.05 | 0.60 
8490 OG) 0785))|| Lert0, Pacer 9,00 | 7.25 | 9.00 | 1.30 | 1.93 | 0.62 
8491 eee 0/820), 2.G5)|-eos-- BaO0H Saaens | sme 1,25 | 2.00 | 0.60 
2620 -| 0.80 | 1.65 |..---- 8.50 | 7.50} 9.60 | 1.20} 1.80 |.--... 
Tabie LVII.—List of specimens examined of SCLURUS TEPITROGASTER. 
Bl E 
| 2 : 3 
5 2 When Ey 
3 5 Locality. From whom received.) Collected by— Ae 
=} = collected. S 
tp a ° 
es | B 
g]/ 2/4 2 
Sr lliee bes a 
8490 27 April—, 1865] Prof. F. Sumichrast .| Prof. F. Samichrast .) Skin. 
SEIEVI||) S DUSS ool) oeee(i Bee atance SonGe COCR CCE eeMEeocae Kee domeevas= Go esses eeeeee - do. 
7206 Pai ce OLEAN S NMOSION leon << cocaeeSs2nen =| 2 cenwasecn-—e> Gosersseeeeeense --do, 
7849 1 Nov. 1, 1864 fy casa ooco=n -.do. 
Se tee OM MEUXIOG rece asset annasacsccacwessetsss|lacceetechaacs Verreanx Brothers. - - do. 
61) eee ft. ee eee are chee |: See eee Hi. de Saussure....-.. --. do. 
Seen Rees heen beeen Oi ment ans seen. se cem sesh ecce=mnmr|sccaneccesemep| exc —nangernadespes-mne|ianneVegsionmcnene= n= ---do. 
8520] .-... .| Central Guatemala...... baecheckc soy kee See Henry Hague. ..---- Henry Hague.....-. -.-do. 
